A unique springable hand-free-self-locking self-centering bracket-clamp fence system comprises fence-post base systems, fence-post systems, springable hand-free-self-locking self-centering bracket-clamp systems, board-expansion-internal-gap rail systems, stackable interlocking fence-board systems, and fence-post-covering cap systems. The fence-post base systems are for supporting the fence-post systems, respectively. The fence-post systems are for supporting the board-expansion-internal-gap rail systems, respectively. The board-expansion-internal-gap rail systems are for supporting the stackable interlocking fence-board systems, respectively. The fence-post-covering cap systems are for preventing water penetration to the inside of the fence-post systems, respectively. The fence-post systems have multiple bracket-clamp-locking jaw slots and multiple bracket-clamp-centering grooves. The springable hand-free-self-locking self-centering bracket-clamp systems have springable hand-free-self-locking self-centering bracket-clamp jaws for locking the springable hand-free-self-locking self-centering bracket-clamp systems in the multiple bracket-clamp-locking jaw slots respectively, springable hand-free-self-locking self-centering bracket-clamp teeth for biting into the multiple bracket-clamp-locking jaw slots respectively, and springable hand-free-self-locking self-centering bracket-clamp groove, for centering the springable hand-free-self-locking self-centering bracket-clamp systems in the multiple bracket-clamp-centering grooves respectively, to center the stackable interlocking fence-board systems in the fence-post systems, respectively, and to offer unique privacy.